Im­ple­ments a com­mand, \new­foot­note, that adds foot­note lev­els
to the stan­dard LaTeX's foot­note mech­a­nism. Foot­notes of
ev­ery ad­di­tional level are au­to­mat­i­cally grouped to­gether on a
LaTeX2ε out­put page and are sep­a­rated from an­other lev­els by
the spe­cial ver­ti­cal spaces. The com­mand \new­foot­note al­lows
cus­tomi­sa­tion of the way foonotes of ad­di­tional level be
rep­re­sented in LaTeX2ε doc­u­ments. Two cus­tomi­sa­tion styles are
avail­able now: the plain style is the or­di­nary LaTeX's style
of foot­note rep­re­sen­ta­tion; the para style causes foot­notes
to be type­set as a run-in para­graph.